165575575049 has 2 divisors, whose sum is σ = 165575575050. Its totient is φ = 165575575048.

The previous prime is 165575574971. The next prime is 165575575111. The reversal of 165575575049 is 940575575561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123594433600 + 41981141449 = 351560^2 + 204893^2 .

It is a cyclic number.

It is not a de Polignac number, because 165575575049 - 2⁸ = 165575574793 is a prime.

It is not a weakly prime, because it can be changed into another prime (165575575349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82787787524 + 82787787525.

It is an arithmetic number, because the mean of its divisors is an integer number (82787787525).

Almost surely, 2^165575575049 is an apocalyptic number.

It is an amenable number.

165575575049 is a deficient number, since it is larger than the sum of its proper divisors (1).

165575575049 is an equidigital number, since it uses as much as digits as its factorization.

165575575049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33075000, while the sum is 59.

The spelling of 165575575049 in words is "one hundred sixty-five billion, five hundred seventy-five million, five hundred seventy-five thousand, forty-nine".